Improvement in anchors



"- A @@tluitml .Staten S Mfr@ @met i EDMOND P. MCOARTHY inno JAMES JOHNSTON, Or SAN FRAN- a CISCO, cALIrOnN1A.

Lette/rs PatentNo. 84,565, dated December 1, v18158.

DYIIPROVEMENT IN .ANCHORS To all lwhom it may conce/Mt:

Be it known that we, EDMOND l?. MOCARTHY and JAMES JOHNSTON, of the city and county of San Franeisco,-State of California, have invented an Improved Anc-hor; and w'e do hereby declare they following description and accompanying drawings are sutlicient to enable any person skilled in the art or science to which it most nearly appertains, to make and use our said invention or improvement without further invention or experiment. p

Our invention relatesto an4 improvement in anchors; and

vIt consists in combining with one shank two sets of arms and iuke's, Operating at right angles to each other, in. such a manner that, in whatever` position the anchor falls, three of the'lukes will be engaged, and so that they are always certaii. to hold.

It also consists in forming a cam in the centre of' y one ofthe bent arms and this cam is operated by the other arms,v so that, when the strain is applied to the cable,

l and one of the linkes enters the bottom, it causes the showing the cam.

A is the shank of the anchor, the lower end of which is divided into two parts,'B and C, so as to form an opening, F, which is of sucient size to allow the arm D to move freely in it.

Through the two sides, B and O, holes are made of I such a size as to admit the bent armG, at the ends'of which are the ilukes H H.

`At the centre of the arm G, a cam, I, is forged, and made to fit the hole a in the arm D, as shown in iig. 2. The opening in the side C is made of such size and shape that it will allow the cam to pass through when it is necessary-to stow the anchor.

The bent armDis placed at right angles with the arm G, operating it by means of the cam I, before described.

At the ends Of the arm D are the ilukes J J, similar in construction to H, but each having, a little back from the end, a curved hook-like projection, c, which causes' the nkes to take hold, whatever the bottom may be.

Ihe arm G is retained in its place by the collars E E, one of which may be keyed. on, so that it can be removed when'it may be necessary to take the arm G out.

The fluke H is also removable, thus allowing the anchor to be easily taken to pieces, when desired.

The operation of our anchor is as follows the i'lnkcs J downward, and as soon as'the strain Vcomes on the cable, the projection C enters and causes the fluke J to enter the bottom. A s it passes deeper into 'the bottom, the arm D operates on the cam I of the arm G, and causes the linkes H H to take with certainty.

When the iiuke J, which is uppermost, rests against the shank A, it forms a powerful fulcrnm or stop, with no danger of breaking, whatever may be the strain.

Our anchor will be extremely valuable for permanent-mooring purposes, as, when it is bedded into the bottom, the currents will bring sand in about it, the three linkes forming asort of crib for retaining it.

Having thus described our invention,

What we claim, and desire to secure by Letters Patent, is p The arm G, having the cam I, in combination with the arm D, with its dukes J J, and the projections c c, or an equivalent device, operating the arm G by means of the cam, the whole constructed and arranged, ,snb stantially as herein described.

In witness whereof, We have, hereunto set our hands and seals.

-EDMOND P. MOCARTHY, [L. s.] JAMES JOHNSTON. [L. s.]

Witnesses:

J. L. BOONE, GEO. H. STRONG.

When it falls to the bottom, it will be with Oneotl 

